Depend which poly you want to go to,
If you want to go in sg poly, you can enter by
the front door at commonwealth ave, there is also a back door
at dover road
If u want to enter Republic poly, the front door is at
woodland ave 5 and the back is at ave 9 and there is a side door
that open only during morning, thru ave 2.
If u want to enter NY poly, i think the front door is at Ang mio
kio ave 5 and the back door at lentor ave
If you want to enter NgeeAnn poly the front door is at Clementi
road, there is a small back door along the PIE expressway, but
seldom open, you need to walk up to enter it.
